1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
package nmea
const (
// TypeABM type of ABM sentence for AIS addressed binary and safety related message
TypeABM = "ABM"
)
// ABM - AIS addressed binary and safety related message
// https://fcc.report/FCC-ID/ADB9ZWRTR100/2768717.pdf (page 6) FURUNO MARINE RADAR, model FAR-15XX manual
//
// Format: !--ABM,x,x,x,xxxxxxxxx,x,xx,s--s,x,*hh<CR><LF>
// Example: !AIABM,26,2,1,3381581370,3,8,177KQJ5000G?tO`K>RA1wUbN0TKH,0*02
type ABM struct {
BaseSentence
// NumFragments is total number of fragments/sentences need to transfer the message (1 - 9)
NumFragments int64 // 0
// FragmentNumber is current fragment/sentence number (1 - 9)
FragmentNumber int64 // 1
// MessageID is sequential message identifier (0 - 3)
MessageID int64 // 2
// MMSI is The MMSI of destination AIS unit for the ITU-R M.1371 message (10 digits or empty)
MMSI string // 3
// Channel is AIS channel for broadcast of the radio message (0 - 3)
// 0 - no broadcast
// 1 - on AIS channel A
// 2 - on AIS channel B
// 3 - broadcast on both AIS channels
Channel string // 4
// VDLMessageNumber is VDL message number (6/12), see ITU-R M.1371
VDLMessageNumber int64 // 5
// Payload is encapsulated data (6 bit binary-converted data) (1 - 63 bytes)
Payload []byte // 6
// 7 - Number of fill bits (0 - 5)
}
// newABM constructor
func newABM(s BaseSentence) (Sentence, error) {
p := NewParser(s)
p.AssertType(TypeABM)
return ABM{
BaseSentence: s,
NumFragments: p.Int64(0, "number of fragments"),
FragmentNumber: p.Int64(1, "fragment number"),
MessageID: p.Int64(2, "message ID"),
MMSI: p.String(3, "MMSI"),
Channel: p.String(4, "channel"),
VDLMessageNumber: p.Int64(5, "VDL message number"),
Payload: p.SixBitASCIIArmour(6, int(p.Int64(7, "number of padding bits")), "payload"),
}, p.Err()
}
|
